Freezer.



FREEZER.

APPLICATION FILED MAR.14, 190s.

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FREEZER.

APPLICATION FILED MAR. 14. 1908.

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FREEZER.

APPLICATION FILED MAR. 14. 1908.

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m m w m m V W m M w w Q r l v i w earn STATES PATENT OFFICE.

GEORGE F. DICKSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO GONFECTIONERS ANDBAKERS SUPPLY (30., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

FREEZER.

Specification of Letters Patent.

Patented Nov. 30, 1909.

application filed March 14, 1908. Serial No. 421,205.

To all whom it may concern:

Be it known that I, GEORGE F. DIo-KsoN, a citizen of the United StatesofAmerica, and a resident of Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Freezers,of which the following is a specification.

This invention relates to that type of freezers in which the freezingchamber is surrounded by an annular refrigerating brine chamber, and isprovided with revolving scrapers and conveyers by which the materialundergoing treatment is kept constantly moving during the progress ofthe operation, an example of which is described in detail in my priorapplication for patent, Serial No. 387,046, filed August 5, 1907.

And the present improvement has for its object to provide a simple andefiicient structural arrangement and combination of parts whereby thesame can be detached from each other in a ready and convenient mannerfor cleaning purposes, and more particularly for the removal of theslime and sediment which accumulate 'very rapidly in the serpentinepassages of the annular brine chamber of the apparatus, all as willhereinafter more fully appear.

In the accompanying drawings illustrative of the present invention:Figure 1, is a central longitudinal section. Flg. 2, is a sectionalelevation, with the freezing chamber and its accessories removed. Fig.3, is a side elevation, with parts in section, of the freezing chamberand its accessories. Fig. 4., is an enlarged detail central longitudinalsec tion. Fig. 5, is an enlarged detail trans verse sect1on on line wa:,Fig. 4. Fig. 6, is an enlarged detail horizontal section.

Similar numerals of reference indicate like parts in the several views.

Referring to the drawings, 1 represents the bed late of the a paratushaving a pair of sadd e pieces 2 0 different heights for the support ofthe freezing chamberand its accessories in an inclined pos'ition'as'shown. Sis a forked pedestal on the base 1 for the supportof the drivingmechanism of the scrapers and conveyers of the freezing chami-i "ba v A,5 and 6 are annular shells held in spaced relation to the headshereinafter described/ to P Q- lb, an 'outeriannular insulatin Ifillambellndapted to contain a filling of' non chamber above referredto',-and which 1 conducting material; an intermediate annular brinechamber divided into a serpentine passage by the series of radialpartitions 7 generally einployed where a circulation of a cooling mediumis used to lower the temperature of .a substance undergoing treat- 0ment, and an inner chamber in which the cream or other material isagitated and frozen. 8 is a head or spider provided with a centralorifice for the passage of the secondary head hereinafter described, andwith an annular flange 9 near its margin, and which fits between therear ends of the shells 5 and 6, to form an end closure for the rear endof the annular insulating chamber above referred to; the connectionbetween the parts being made permanent "by solder or other usual means.A

10 isthe secondary head above referred to, and which is provided at itscenter with 75.-

a tubular hub or neck 11 which passes through the central orifice of thehead 8 and is externally screw-threaded for the reception of a holdingnut or collar 12 by which the heads are held in proper relation when theparts are assembled. At its periphery said head 10 is provided with anannular flange l3 inside of which the rear end of'the inner shell 4 issecured'by solder V or other usual means,and such flan e has anexternaldiameter approximating t e internal diameter of the shell 5 so as to becapable of longitudinal movement in said shell durin the assemblage anddisassemblage o hereinafter more fully described.

14 is a rin ward ends 0% end closur for the annular insulatingchainberabove referred. to. I I l 15 isa secondary ring or a nulus,inside of whichthe forward'end of the inner shell 4 is secured bysolderor other means;- Such ring 15 is adapted. 'tofit against the rin 'let; jto forms; closurefor-the forward-end'or the' 100 brine chamberaboveireierred to, and, is pro-T vided ,Witha marginal flange'ldforminga recess; for' the receptioh'of thQ-QlOSHI'e head of the frce'zinchamber. 17 is'the c osure head for the freein e1 in place in aremovable manner by b extending through'the rings 1}} .and if) and the.parts of the apparatus go or annulus secured to the forthe shells 5 and6 to form an in of the closure head and througl'i the mar provided withclamping nuts in Fig. 6.

, 20 is an inlet neck or hopper, and 21 a gated outlet neck formed onthe removable head l7, and providing a convenient means for filling andemptying the freezing chamber.

52-2 is an open top tank for initially receiving the supply of cream tobe frozen; such tank is supported by suitable brackets above the mainapparatus above described, and is provided with a faucet 23 at itsforward end and adapted to discharge into the inlet neck 20 aforesaid. I

2 lis an inner axially arrangedshaft arranged longitudinally in thefreezing chamher, with its forward end'journaled in a bearing recessformed therefor in the removable head 1.7; while at its rear end saidshaft extends to the rear ofthefreezing chamber and provided with nnomcircular end for detachable engagement with the driving, gear ashereinafter more fully set forth.

25 is a tubular shaft having bearing in the bore of the hub or neck 11of the secondary head 10, before d.escribed, and forming in turn abearing; for the aforesaidinnor shaft 24;. Such tubular shaft alsoextends to the rear of the freezing chamber and is provided with a keyway or'like non-circular portion for operative engagement with thedrivinggear hereinafter described.

26 is a circular rim carried by the shaft and adaptc to fit acorresponding rec the inner face of the head 10, to constitute a sealinggland against leakage along the periphery of said shaft.

27 are a pair of scraper and conveyor blades moving in contact with the'iicular' inner wall of the freezing chamber, and extending the lengthof -the same m a plane oblique to the longitudinal a is of theapparatus. Such blades are att red at their rear ends to arms 28 on theshaft as aforesaid, and'at their forward endsto similar arms of a spider39 the hub of which has journalcd bearing on theforward end of the shaftQ l aforesaid.

30 are a series of inclined conveyor blades carried by the axial shaft2%, and extending radially into adjacent relation to the blades 27aforesaid;

31 and 32 are bevel gears journaled by mcansof their. hubs in the forksof the pedestal. 3 on the main base, in separated relation and upon anaxis common with that of the freezing chamber and the shafts 2. andaforesaid. The bevel gear 31 is adapted. to have detachable operative engagement with .the rear end of the tubular shaft25 by a key and keyway33, or other usual non-circular formation of parts; while the bevel gear32 carries a section of shaftas shown *ing 3%, the forward end of whichis formed with a noncircular recess for operative en gageineut with acorrespondingly formed noncircular extension on the rear end of the"shaft 2 f aforesaid.

' 36 is an intermediate bevel gear meshing with and driving theaforesaid bevel gear 3]. and 32 in opposite directions; such bevel gear36 is carried by a shaft which in turn is connected in any usual mannerwith a power source.

37 is the brine inlet neck arranged near the lowermost part of the brinechamber, and 3b is the brine outlet neck arranged at the highermost partof said brine chamber.

The main feature of novelty in the present improvement consists in thefixed attachment iof the radial partitions 7 of the brine chamiber tothe inner shell 4 so as to be removable therewith in the operation ofdismembcring the apparatus for the periodical cleaning of the brinechamber. It has been found from chamber rapidly clogs up with slime andrapid decrease in the cfliciency of. the apparatus when allowed toaccumulate.

Nith a view to provide for a ready and effective cleaning of the brinechamber, the

with the detail construction of the apparatus operation of unscrewingholding nut or col lar 12, when the inner shell 4;, carrying the head10, annulus 15 and closure head 1?, as well as the operating shafts 2tand whole be drawn longitudinally out of the shell 5, and then awayfrom. the othe fixed parts of the apparatus as illustrated in Figs. 2and 3, and in which condition the partitions 7' forming the serpentinebrine of the apparatus are fully exposed and accessible for the requiredcleaning operation. The detachable connection of the shafts 24: and totheir bevel gears 31 and 32 above described permits of the readyperformance of the disconnection of parts above described. The generaloperation of the apparatus in the manufacture of ice-cream or the likewill be the same as that described. in my aforesaid. application SerialNo. 387,045, or other apparatus of the same type and now usedextensively in the manufacture of icecream.

Having thus full described my said invention, what I claim as new anddesire to secure by Letters Patent, is t 1. The combination in afreezer, of an innor closed casing constituting a freezing chamber andcarrying a 's'eries of partitions on its outer surface, an outer casingfitting over said inner casing and its partitions to form-a brinechamber and provided with a other impurities in a short time, to cause aabove described arrangement of the radial. partitions 7 is made, andwhich in commotion can as a extended practical experience that such.brine heretofore described. admits of a dis- I mcn'rherment of theapparatus by the simple nor closed cylindrical cash freezing chamber andcan one a series of head at one end, and means for ehehly connectingsaid casings together, the some comprising a cenirai neckon the innercasin heed projecting through a central end orifice in the enter casing,fastening means engaging said ccn'zrai neck, in a, manner Which permitsof ready iongit dinni separation oi the casings in ciem 'ng outthe brinechamber, subs nitially as set forth.

The combination in a; freezer, of an in nor closed casing constitntii afreezing chamber and carrying series perizi'iions on its or? snrfoce,-an enter 4, fitting over said inner casing and its partitions to form nbrine chamber and g arovidcd with n head at one end, and means fordetachabiy connecting said casings togeihcr in ii men-- ner whicnpermits of ready iongitudinoi separation the casings in ci wing outv thebrine chamber, the some comprising {a corn tra-l neck on the innercasing head projecting through a. centred orifice in the outer casinghead and sore threaded, and a holding nnt en oging said screw threadedneck, substmn tia iiy SGiiforth.

3. The con'ibination in a freezer of an in constituting a redialpartitions on its periphery, an outer casing fitting over said innercasing and partitions to form a brine chnn'iher and provided with n headat one end, and means for detechahiv connectin said casin to-' gethcr ina manner which pe mits of ready longitudinal separation oi? the incleaning out the brine chamber, the no comprising a central neck on theoer on head projeciin hrongh s cc oi in the on" cosii need and scihreadcd,

and a holding nut engaging said screwthreaded neck, substantially as setforth.

4. he combination in a freezer, of en inner casing constituting avfreezing chamber and having a fixed head at one end and a removable headat the other end and 'nrseries of partitions on its outer surface, outercasing iiiiing over said inner casing and partitions to form a brinechamber and pro vided with end head having a central neck, and meansengaging neck for detechabiy connecting said casings together in c,nmnner which permits of ready longitudinal separation of the casings inclean ing out the brine chamber, substantially as set forth.

5., The combination in a freezer, of an inner casing constituting afreezing chamber and having a fixed head at one end and a.v

separation of thecnsings in cleaning out ihe brine chan'ibor, the somecomprising :1 central neck on the inner casing heed projecting through acentral orificein the outer casing head and screw-threaded for thereception of a holding nut, substantiaiiy as set forth.

Signed at, Chicago, iliin ois. this 10th (in; of Ivinrch, 190i) '"rrBnnns, Kimmy Mon.

